How can I 'getchar()' in module code?

[乃宏周]

Thanks your replies! I found the target.

2013/12/5 上午9:34 於 "Peter Teoh" <htmldeveloper at gmail.com> 寫道：

> yes, exactly - what u are describing is called "kdb".   don't mixed up
> with "kgdb".
>
>
> kdb:   this is debugging on the same computer - so no serial ports
> connection are needed.   once exception occurred, you will be popped into a
> special debugger screen.   problem is that now this debugger is running in
> kernel mode, inside the same computer that have the kernel module crashing,
> and so everything stop running, only kdb is running.
>
> (NOTE:   i played with this almost like 8 or 9 years ago, and it seemed
> now kdb is not updated any more.)
>
> kgdb:   this always require TWO computer:   host + debuggee.   kgdb is
> running inside the debuggee whose kernel has crashed, and gdb is running in
> host.   normally connected via serial port.   normally the preferred way is
> to run the kernel to be debugged inside the VirtualBox, or VMWare, and then
> gdb host is the virtual machine host.
>
> diff between the two is explained here:
>
> https://www.kernel.org/pub/linux/kernel/people/jwessel/kdb/CompileKDB.html
>
> and setup are here (mainly for kgdb):
>
> http://elinux.org/KDB
>
> http://allmybrain.com/2010/04/29/debugging-linux-kernel-modules-with-virtualbox-and-kgdb/
> http://www.linuxforu.com/2011/03/kgdb-with-virtualbox-debug-live-kernel/
>
> have fun.
>
>
>
>
> On Tue, Dec 3, 2013 at 8:35 PM, 乃宏周 <naive231 at gmail.com> wrote:
>
>> For debugging purpose, I want something like 'getchar()' that can pause
>> execution in the module code. Do any candidates I can choose?
>>
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>>
>> --
> Regards,
> Peter Teoh
>
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